Around here, we call that "overseeding" and do it deliberately in early spring or late fall. No guessing on the survival rate of your experiment since time of year, type of grass, and optimum sprouting temperature would all affect the outcome. However, if it is the right kind of grass for your area and it does sprout and grow, I wouldn't call that a waste of seed :-)

Poor you, you need help! Try posting your question on the Lawncare forum: http://forums2.gardenweb.com/forums/lawns/

Hello, there is a big, bare patch of lawn in my front yard that needs to be seeded in the next week or 2 and going to overseed the rest of the lawn as well. I bought some seed and the person at the store recommended Greenview Grass Seed Accelerator. They said to spread this on top of the seed to help it germinate (and keep the birds away). I was planning on putting down Scott's Winterguard as well but does the Greenview Accelerator take care of this? Is is redundant to put down both? Should I add the Greenview to the bare patch and simply put the Winterguard down on the rest of the lawn? Any advice you can give would be appreciated,

Where are you located? It's still a bit early for overseeding if you have a cool season type lawn. Better to wait until mid September when temperatures cool more and rain is more plentiful. And you do not need the Scott's product when overseeding - the Greenview product has everything you need for now. In fact, if the Winterguard is the weed and feed type, you will only succeed in stifling any overseeding completely. When and if you do fertilize with the Winterguard, wait until after the first mowing of the newly overseeded lawn. But it is NEVER a good idea to use a weed and feed product. It is overkill for any weeds (50-75% more herbicide than is necessary), it leaches readily into groundwater and causes pollution and can be harmful to kids and pets. Weed control is best handled by manual removal or barring that, a liquid spray weed killer used only where the weeds currently exist. Once dry, it will not leach nor will it cause issues for kids and pets.